Lifting-jack



(No Model.)

A. E. HERMAN.

LIFTING JACK.

Patented Aug. 4, 1885.

.. x, W Lu m u: My Q Q W m m lhvrrnn TATES ADOLPH HERMAN,

Parent Orricn.

OF RAVENNA, OHIO.

LlFTlNG-JACK.

SPECIFICATION Application lilcd March 9, 1885. (X0 model.)

To all 1071,0711 it may concern:

Be it known that l, AnoLrn E. HERMAN, a citizen of the United States, residing at Riv venna, in the county of Portage and State of Ohio, have invented a new and useful Iniprovemcnt in Lifting-Jacks, of which the following is a specification.

In the drawings, forming a part ofthis specification, Figure 1 is a side elevation of the machine with the various parts in position for lifting. Fig. 2 is alike elevation of a part of the machine, representing the parts in position to hold an object when it has been lifted. Fig. 3 is an edge elevation of the machine with its parts in the same relative positions as shown in Fig. 2. Fig. iisa horizontal section of the machine at line 1 in Fig. 1. Fig. 5 represents the under side of lever Z, with one of the links D in place, and the other sectional and in position to be inserted in place, and Fig. 6 is a horizontal section of the machine at line 2 in Fi 1.

The standard (1 is of a single piece of casting, forming the base of the machine, and is grooved vertically on two opposite sides to receive guides It h, which are bars firmly bolted to the standard. The lifting-bar g is cast in a single piece, formed with a suit-able head, a", to bear against and support the object to be lifted, two grooves, a, on opposite sides of the bar to receive guides h, a slot, to, and recesses or notches c to engage with lever Z. lhe upper ends of guides it have lugs a, ex tending out and down to form, with the main body of the guide, double bearings for the short shaft or bolt 0 on both sides of bar g.

The links 1') are hung or pivoted in these.

double bearings. Bolt c is screwthreaded at one end and provided with a nut, e, to hold the upper ends of guides h in place in grooves a. Bolt e extends through slot (1,, which is of sufficient length to allow bar 9 to be moved up and down the desired distance. Recesses or notches c slant upward, and their upper partis of a semicircular form to permit the end hearing, 8, of the short arm of lever Z to turn in them. The lower ends of the two links b are pivoted to lever Z, and are each formed with double bearings i 13.

Lever Z is also slot, r, for the formed with two double bearings, 0 0', to receive the link. The outer bearing, 0, is formed in log Z, and the inner bearing, 0', is open, in order that the end of link 1), formed with corresponding bearings, i i, maybe inserted in them, as shown in Fig. 5. Between the two double bearings 0 0 lever Z is formed with a notched side of bar 1 to enter, in order that when an object has been lifted by pressing down lever Z to the position shown in Figs. 2 and3 the bearing 8 at the end of the lever may be out from a vertical plane through thelower bearings of the links, and thereby continue to hold up the weight and bar 9 when leverZ is released frointhe hand.

In operating the lifting jack herein described, the lever Z should be held out of notches 0, while bar 9 is slid up by hand in guides it till the top a? of the bar is against the under side of the object to be lifted. Thebearing s of lever Z should then be let into one of the notches e in the position shown in Fig. 1. By pressing down the outer arm of the lever bar 5 is lifted. .Vhen lever Z has been thus pressed down until the lower bearings, 11, of links Z) have passed a vertical line through bearing 3, the pressure of bar 1 will force the lever against the notched side of the bar and hold it there.

I claim as my invention-- 1. In a lifting-jack, lcverZ and links b, in combination with guides h and lifting-bar r formed with notches c, substantially as described.

2. The lever Z, formed with slot Z and end bearing, 8, lllCOlllblDtlt-lQll, with links Z1, guides 71, and bar 9', formed with notches c, substantially described.

3. The lever Z, formed with slot Z" and double bearings 00 at each side of the slot, one of the bearings 0 '0 being open, in combination with links 1), formed with bearings i 1', guides h, and lifting-bar 9, formed with notches c, substantially as described.

l. Guides h, formed with lugs a, and bolted to standard (Z, in combination with notched bar g, links I), and lever Z, substantially as described.

iii

5. Thelifting-bar g, ofa singlcpiece, formed 7. The lifting-bar 9, formed with inclined IO with a head, (4 two opposite grooves, a a, slot notches 0, whose upper parts are semicircular, a, and notches c, in combination with guides in combination with lever Z, formed with an it, bolt 0, links I), and lever Z, substantially as 1 end bearing, 8, to fit and turn in the upper 5 described. part of said notches, substantially as described.

6. The standard d, of asingle piece of cast- ADOLPH E. HERMAN. ing, forming a base, and grooved vertically on Attest: two opposite sides; in combination with and J. T. RIDDLE,

bolted to guides h h, substantially as described. BRADFORD HowLAND. 

